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Margaret writes,

Can I use the same sprayer to apply the Bonide product that iI use for RoundUp?

I have a good sprayer that I use for Round-Up. If I put the spray concentrate for Bag Worms in this sprayer will it hurt the Leland Cyprus trees?


It is perfectly fine to use any other product out of the same sprayer that you use RoundUp in, as long as you triple rinse the sprayer and wash it out thoroughly.  If you do not wash it out thoroughly, then you could damage or kill the tree with the residual RoundUp left in your sprayer.  You should always triple rinse the sprayer if you are changing the product that you are using.  Triple rinse means to rinse out the inside of the sprayer 3 times, and also fill it with water and run clean water through the hose for at least 1 minute to make sure that there is no residual left in the hose in addition to the tank.

Answer last updated on: 05/30/2011

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